Originally Posted by
nicolas75
I cannot understand why you accepted to pay.
I fully agree. I think it would take a police visit to the reception, at minimum, to get me to pay an extra 420 Euros that I hadn't agreed to on a reservation, especially if I had the printed confirmation in my hands too! I just wouldn't have paid it.
In my experience battling these things out afterwards is always more difficult than dealing with it at the time.